In the early 1980s, by determination of Boorola gene (FecB) in Booroola sheep with high ovulation rate, there has been a great interest for identification genes that are responsible prolificacy and their use breeding programs. The mutation occurred Bone morphogenetic protein 15 (BMP15), protein-1B (BMPR-1B) Growth differentiation factor 9 (GDF9) have found to increase rate. Additionally some ot...

The aim of this study was to show the efficacy of artificial insemination employing three different diluents (A, B and C). These diluents were : (A) Galap (IMV, France), (B) DLBR (Tris-citric-glucose), (C) MA24 (Laboratorios Ovejero, León, Spain). The inseminations were done in a commercial farm. A total of 8 million of spermatozoa per dose were inseminated. A total of 2125 artificial inseminat...

The influence of copper upon some physiological parameters and reproduction in ewes was studied. Four groups of animals were investigated: 1/ control ewes (untreated); 2) ewes receiving copper as a supplement over the recommended amount of copper in food (10, 25 or 50 mg Cu/ewe/day); 3/ control, superovulated ewes; and 4) ewes treated with 50 mg copper during one month and then superovulated. A...

Seventeen-marker simple tandem repeat genetic analysis of Irish Y chromosomes reveals a previously unnoted modal haplotype that peaks in frequency in the northwestern part of the island. It shows a significant association with surnames purported to have descended from the most important and enduring dynasty of early medieval Ireland, the Ui Neill. This suggests that such phylogenetic predominan...

We use archival Spitzer Space Telescope photometry of the old, super-solar metallicity massive open cluster NGC6791 to look for evidence of enhanced mass loss, which has been postulated to explain the optical luminosity function and low white dwarf masses in this benchmark cluster. We find a conspicuous lack of evidence for prolificacy of circumstellar dust production that would have been expec...